I'm sure they had a reason, but I suspect a lot of it is that they lacked sufficient technical expertise, rather than it being a deliberate decision of an infor

I'm sure they had a reason, but I suspect a lot of it is that they lacked sufficient technical expertise, rather than it being a deliberate decision of an informed individuals. That they didn't encrypt all the information at their hideout indicates a lack of technical knowledge. That said, you're right that they're extremely good at hiding via more conventional means.